摘要
介绍了G32柴油机主轴承盖的铸件结构及技术要求。由于采用原铸造工艺生产的铸件存在较严重的缩孔、缩松及磁粉探伤磁痕等质量问题,为查明缺陷的产生原因,对铸件结构、铸造工艺等情况进行了分析,最后通过调整浇注系统、浇注温度、冷铁数量和位置、改进冒口等措施,试生产了220件主轴承盖,结果显示:有9件铸件报废,其中粘砂、夹渣各报废1件,胀箱报废2件,缩孔、缩松报废5件,总废品率降到4.1%,缩孔、缩松缺陷等到了控制,铸件质量也有了显著提高。
The casting configuration and technical requirements of main bearing cup used for G32 diesel engine were introduced. Since there relatively serious quality problems including shrinkage cavities and porosities as well as magnetic trace in magnetic detection test were existing with the castings produced by using original casting method,in order to reveal the defects-causing reasons,the relevant situations such as the casting construction,casting method et al. were analyzed. Finally, by adjusting gating system,pouring temperature, chilis number and their setting locations,improving risers, et al. 220 pieces of main bearing cups were produced on trial. The result showed：9 pieces of castings were rejected including 1 piece due to burning-on, 1 piece due to slag inclusion,2 pieces due to swelling,5 pieces due to shrinkage,the total rejection rate decreased to 4.1% ,the shrinkage cavities and porosities defects had been controlled and the casting quality also had been obviously elevated.
出处
《现代铸铁》
CAS
2016年第1期34-36,共3页
Modern Cast Iron
关键词
球墨铸铁
主轴承盖
缩孔
缩松
磁粉探伤
nodular iron
main bearing cup
shrinkage cavity
shrinkage porosity
magnetic detection test
